[Native Image] ExtendedOpenOption.DIRECT failing with --future-defaults=all #12567
Description
Describe the Issue
I'm running into an issue with GraalVM CE 25.0.1 when using ExtendedOpenOption.DIRECT together with --future-defaults.
Example on a Linux system supporting O_DIRECT:
dd if=/dev/zero of=four_kb_file oflag=direct bs=4k count=1
# DirectSupportedApp.java
import com.sun.nio.file.ExtendedOpenOption;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
public class DirectSupportedApp {
public static void main(String[] args) throws IOException {
try(FileChannel fileChannel = FileChannel.open(Path.of("four_kb_file"), StandardOpenOption.READ, ExtendedOpenOption.DIRECT)) {
System.out.println(fileChannel.size());
}
}
}
works without native image
> $ javac DirectSupportedApp.java;java DirectSupportedApp
> 4096
works with native image as well
> $ native-image -cp . DirectSupportedApp; ./directsupportedapp
> 4096
doesn't work with native image with future defaults
> $ native-image --future-defaults=all -cp . DirectSupportedApp; ./directsupportedapp
$ ./directsupportedapp
Exception in thread "main" java.lang.UnsupportedOperationException: DIRECT not supported
at java.base@25/sun.nio.fs.UnixChannelFactory$Flags.toFlags(UnixChannelFactory.java:100)
at java.base@25/sun.nio.fs.UnixChannelFactory.newFileChannel(UnixChannelFactory.java:115)
at java.base@25/sun.nio.fs.UnixChannelFactory.newFileChannel(UnixChannelFactory.java:145)
at java.base@25/sun.nio.fs.UnixFileSystemProvider.newFileChannel(UnixFileSystemProvider.java:211)
at java.base@25/java.nio.channels.FileChannel.open(FileChannel.java:301)
at java.base@25/java.nio.channels.FileChannel.open(FileChannel.java:353)
at DirectSupportedApp.main(DirectSupportedApp.java:9)
at java.base@25/java.lang.invoke.LambdaForm$DMH/sa346b79c.invokeStaticInit(LambdaForm$DMH)
works with native image with future defaults subset
> $ native-image --future-defaults=run-time-initialize-security-providers,complete-reflection-types -cp . DirectSupportedApp; ./directsupportedapp
> 4096
Since I'm building and running on the same machine I would not expect the failures.
This issue was brought to the attention of vjovanov who suggested this ticket is for @zapster.
Using the latest version of GraalVM can resolve many issues.
- I tried with the latest version of GraalVM.
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Operating System and Version
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Troubleshooting Confirmation
- I tried the suggestions in the troubleshooting guide.
Run Command
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Expected Behavior
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Actual Behavior
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Steps to Reproduce
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Additional Context
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Run-Time Log Output and Error Messages
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